Hacksaw blade



june 23, 1936. SALVADOR 2,U45,105

HAcKsAw BLADE Filed Dec. 5, 1955 INVENTOR Lmo SALVADOR.

ATTORNEY Patented June 23, 1936 HAGKSAW' BLADE I Lino Salvador, NewYork, N. Y.

Application December 5, 1935,Serial'No. 53,008 2 Claims. (01. 143-134) TN]TEi-o A T IQ'FFI'QE .IThis-inventionrelatesto new and usefulimprovements in hacksaw blades for L an-d T shaped cuts. Theinventionhas for anobject the constructionof a hacksaw blade-froma stripof material having a. vertical fore. portion with an-end por-. tionthereof connected by a bent portion to an end portion of an aftportionin a plane at anangle tothesaid vertical fore portion,-andhacksaw 0 teeth uponzthe bottom edge of the vertical fore portion andupon the side 'edges of the aft portion.

It is old. to construct a saw blade from a strip of material having avertical portion with saw teeth along a section ofthe bottomedge'thereof continuing along the sideedge of a bottom flange orportion-bent from said vertical portion. The advantage of the instantinvention over the. prior constructions previously explained; resides.in'the'fact that with the new arrangement it isposs'ible to sawina'verticalplane to any "desired depth and continue sawing in ahorizontal plane to any desired distance. With the prior constructionsit was only possible to saw .35 vertically to anyvdesired depth and tocontinue sawing horizontally to the maximum width of the flange portionpreviously mentioned, and no further.

A'further. object of theinvention is theprovision of meansforfacilitatingthe attachment of the hacksaw to a hacksaw frame arrangedina manner to. prevent undue stresses upon the blade which isliable tobreak it.

Another object of the invention is the construction of a device asdescribedwhich is simple and durablean'd which. can be manufacturedandsold'ata reasonable cost. I

'For further comprehension of the-invention, and of the objectsand=advantages thereof, ref- 4o-erence will be had'to the followingdescription and "accompanying drawing, and to the ap-1 pended claims inwhich the variousnovel features of the invention are.moreparticularlysetforth.

In the accompanying drawing forming a material. part. of thisdisclosure:

Fig.1 is a side elevational view of a hacksaw with a blade constructedaccording to this invention.

Fig. 2 is a horizontal sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is a perspective view of the blade, per se.

Fig. 4 is a perspective view of a blade constructed according to anotherembodiment of this invention.

V stressesliable tobreak the hacksaw.

Fig; 5 is a perspective view of ablock of wood with several cuts formedwith thehacksaw .disclosed. n

Fig. 6 is a'fragmentary perspective View of anotherlhacksaw' bladeconstructed accordingzto a further modification of the invention.

' Fig. Tis a fragmentary side elevational view of a hacksaw With a bladeaccording to a modified form'of' the invention. r

The hacksaw' blade, according to this invention, is'formed' with astripof material having a vertical foreportion ID with an end Illthereof connected by a bent-portion- H to an end por tion l2 of an aftportion l2 in the plane at an angle" to the vertical fore portion. Thebottom edgeof. the vertical fore portion H) is formed with saw teeth l3continuing at theendportion Ill with sawteeth M on one edge of the-aftportion l2. Saw teeth l5 areformed upon' the other edge of the aftportion 12. Tl'u'a'endportion I'll of the fore portion tapers'down asclear- 1y shown-in Figs. land 3 so as to' continue into the plane of theaft portion. I

A-feature of thebent portion 1 l is that the material of the hacksaw atthis area is composed of sections atx'r-ight. angles to each otheracting as a. reinforcement, and stiffening the hacksaw blade. i

Afurtherand more important feature of the inventionis that the aftportion I 2: is not obstructed: by the 'fore portion I0, so that it ispose sible' to'saw horizontally toany desired distance.

A means is'provided for facilitating the attachment of the hacksaw upona hacksaw frame in' such a manner as to reduce or-eliminate Moreparticularly, an aperture Wis-formed in' the free end of the aft'portionl0 and is located so that its axis isin thesa'me plane as the plane ofthe vertical fore portion l0. An aperture I1 is formed in the free 'endof the-fore portion ID; and'is'arranged with'its axis in the same planeas the plane of the aft portion l2. With thisar rangement it isposs'ibleto engage holding pintles throughthe-apertures'I6 and I1 and reciprocatethe hacksaw without'any deflecting stresses.-

In Figs. 1 and 2 a hacksaw frame is shown consisting of a handle I8connected with a frame l9. This frame comprises a central portion l9connected with ends l9 and Hi. The lower portion of the end l9 is formedwith a slot l9 into which the end of the fore portion l0 engages. Ascrew 2| passes through the slot l9 in the portion l9 and has anenlarged end portion Zi with a hook 2| engaging the opening IT. A wingnut 2I threadedly engages on the screw 2I and has a shank portion 2I"engaging in a recess on the edge of the portion IS The lower end of theportion I9 is formed with an enlarged loop 22 into which extension barI8 of handle I8, slidably and rotatably engages. The extension bar I8 isprovided with a hook I 8, adapted to engage through the aperture I6. Theextension bar is also provided with an aligning pin I8 for selectivelyengaging corresponding horizontal or vertical slots 24 in the face ofloop 22 when the blade is tight in the holder.

It will readily be seen that the hacksaw may be reciprocated forwardsand backwards and at all times there will be no bending moments exertedon the blade.

In Fig. 4 another embodiment of the invention has been disclosed inwhich the blade is adapted to be mounted upon a conventional hacksawframe instead of a special frame as described in the previous paragraph.With the arrangement shown in Fig. 4, there is an aperture I6 formed ina vertical lug portion I2 stamped from the aft portion I2 and thisaperture I6 is in line with an aperture I'I formed in the free end ofthe fore portion II). This blade may be attached by wing screws or byany other arrangement upon the ends of a hacksaw blade of conventionaldesign in which it is required that apertures be located in the ends ofa standard blade (a blade in which all portions are in the verticalplane).

In Fig. a block of wood .20 is illustrated with several cutout portionsformed with a saw constructed according to this invention.' The top ofthe block is formed with an opening 2I produced by vertical andconverging cuts extended down from the top face 20 of the block to thepoints 20'. These portions of the cuts are formed with the fore portionof the hacksaw blade. When the points 2(1 have been reached, the hacksawblade is drawn forwards so that the aft portion I2 goes into operation.The sawing may be towards the right or the left since there are teeth onboth sides of the aft portion.

The block 20 is also shown with an inverted T shaped cut 22 formed withthe hacksaw. This T shape cut comprises a vertical cut 22 formed withthe fore portion of the blade and connecting with horizontal cuts 22 and22 formed respectively with one and the other sides of the aft portion.The block 20 also has its lower corners formed with cutouts 23consisting of vertical cuts connecting with horizontal cuts to cut outthe corners thereof.

In Fig. 6 another modified form of the invention has been disclosed inwhich there is a hacksaw blade shown adapted to be mounted upon ahacksaw holder of the type illustrated in Fig. 1 or also upon theconventional hacksaw holder. More particularly, the fore portion ID ofthe hacksaw blade is formed with the apertures I1 and I1 The free end ofthe aft portion I2 is formed with the aperture I6 which connects with alongitudinal slot I6. A lug I6 engages through the longitudinal slots I6and connects with a head portion It on the bottom side of the blade. Thelug I6 is formed with an aperture IG Thus, the apertures I6 and II maybe utilized for attaching the saw on a conventional hacksaw frame, orthe lug Hi may be removed by slipping it through the slot I6 and thenthe apertures I6 and Il may be utilized for attaching the blade to ahacksaw frame as illustrated in Figs. 1 and 2.

In Fig. '7 a wing clamping screw 24' is arranged at the side of the sideportion I9 of the frame I9 and engages a threaded bolt 24. The boltpasses through the side portions I 9 and aperture IIS of lug I6 While Ihave illustrated and described the preferred embodiment of my invention,it is to be understood that I do not limit myself to the preciseconstruction herein disclosed and the right is reserved to all changesand modifications coming within the scope of the invention as defined inthe appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

1. A hacksaw blade for L and T shaped cuts, comprising a strip ofmaterial having a vertical fore portion with an end portion thereofconnected by a bent portion to an end portion of an aft portion in aplane at an angle to the vertical fore portion, the bottom edge of thevertical fore portion having saw teeth continuing at the end portionwith saw teeth on one edge of the aft portion, and saw teeth on theother edge of the aft portion, and means for facilitating attachment ofthe blade on a hacksaw frame comprising an aperture in the free end ofthe fore portion and a complementary aperture similiary arranged incomparison with said aperture and formed in a lug which is parallel tosaid fore portion and connected with the free end of the aft portion foruse in a hacksaw frame of conventional type.

, 2. A hacksaw blade for L and T shaped cuts, comprising a strip ofmaterial having a vertical fore portion with an end portion thereofcon--, nected by a bent portion to an end portion of an aft portion in aplane at an angle to the vertical fore portion, the bottom edge of thevertical fore portion having saw teeth continuing at the end-portionwith saw teeth on one edge of the aft portion, and saw teeth on theother edge of the aft portion, and means for facilitating attachment ofthe blade on a hacksaw frame, comprising a pair of apertures in the freeend of the vertical fore portion, an aperture in the free end of thehorizontal aft portion and connecting with a slot, a lug parallel withsaid fore portion and mounted through the slot and upon said end andformed with an aperture coactible with one of the apertures of the foreportion for the attachment of the blade in position on the hacksaw frameof conventional type.

LINO SALVADOR.

